CVE-2026-43916— pam_authnft: Heap buffer overflow in NETLINK_SOCK_DIAG reply walker
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I. Basic Information for CVE-2026-43916
Vulnerability Information
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Vulnerability Title
pam_authnft: Heap buffer overflow in NETLINK_SOCK_DIAG reply walker
Source: NVD (National Vulnerability Database)
Vulnerability Description
pam_authnft is a PAM session module binding nftables firewall rules to authenticated sessions via cgroupv2 inodes. Prior to 0.2.0-alpha, a heap buffer over-read in peer_lookup_tcp (src/peer_lookup.c:134, prior to the fix) allowed a crafted NETLINK_SOCK_DIAG reply to slip past the message-size check, then dereference past the end of the allocation. This vulnerability is fixed in 0.2.0-alpha.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨界内存读
Source: NVD (National Vulnerability Database)
Vulnerability Title
pam_authnft 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
pam_authnft是identd-ng开源的一个基于nftables的Linux用户会话网络过滤规则管理工具。 pam_authnft 0.2.0-alpha之前版本存在缓冲区错误漏洞，该漏洞源于peer_lookup_tcp函数中存在堆缓冲区过度读取，可能导致处理特制NETLINK_SOCK_DIAG回复时越界读取。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| identd-ng | pam_authnft | < 0.2.0-alpha | - |
II. Public POCs for CVE-2026-43916
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://github.com/identd-ng/pam_authnft/pull/10x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-43916
IV. Related Vulnerabilities
V. Comments for CVE-2026-43916
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